 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.misc;

 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.ImageData;
 import org.eclipse.ui.ISharedImages;
 import org.eclipse.ui.internal.WorkbenchImages;

 /**
  * An image descriptor that loads its data from a program file.
  */
 public class ProgramImageDescriptor extends ImageDescriptor {
     private String filename;

     private int offset;

     /**
      * Creates a new ImageDescriptor. The image is loaded
      * from a file with the given name <code>name</code>.
      */
     public ProgramImageDescriptor(String fullPath, int offsetInFile) {
         filename = fullPath;
         offset = offsetInFile;
     }

     /**
      * @see Object#equals
      */
     public boolean equals(Object o) {
         if (!(o instanceof ProgramImageDescriptor)) {
             return false;
         }
         ProgramImageDescriptor other = (ProgramImageDescriptor) o;
         return filename.equals(other.filename) && offset == other.offset;
     }

     /**
      * Returns an SWT Image that is described by the information
      * in this descriptor. Each call returns a new Image.
      */
     public Image getImage() {
         return createImage();
     }

     /**
      * Returns an SWT Image that is described by the information
      * in this descriptor.
      */
     public ImageData getImageData() {
         /*This is a user defined offset into the file which always
          *returns us the defualt - return the default regardless*/

         return WorkbenchImages.getImageDescriptor(ISharedImages.IMG_OBJ_FILE)
                 .getImageData();
     }

     /**
      * @see Object#hashCode
      */
     public int hashCode() {
         return filename.hashCode() + offset;
     }
 }

